Valve.



G. E. SMITH.

VALVE.

APPLICATION FILED APR. 27. 1909.

Patented Nov. 16, 1909.

Witnesses CHARLES H. SMITH, OF SSE/ANTON, PENNSYLVANIA.

VALVE.

smear.

Specification of Letters Patent.

Patented Nov. 16, 1909.

Application filed April 27, 1909. Serial No. 492,550.

To all whom "it may concern:

Be it known that 1, CHARLES H. SMITH, a citizen of the United States,residing at Scranton, in the county of Lackawanna and State ofPennsylvania,have invented certain new and useful Improvements inValves; and I do hereby declare the following to be a full, clear, andexact description of the invent-ion, such as will enable others skilledin the art to which it appertains to make and use the same.

This invention relates to improvements in air valves, and particularlyto what is known as engineers or motormans valves.

The object in view is the arrangement in a valve of means for turning onand off pressure to and from the brake system of the car without unduefriction and wearing of parts.

Another object of the invention is the arrangement of a pair ofoppositely opening ports and a centrally disposed member acting on saidports, whereby when said means are moved in one direction one of saidports will be opened and when moved in the opposite direction the otherof said ports will be moved.

A still further object of the invention is the arrangement of aplurality of ports closed by reciprocating members, and a controllingmember formed with projecting levers or ends for opening said ports whenit is desired to either apply the brakes or relieve the pressure on thebrakes.

Another object of the invention is the ar rangement of an engineersvalve that is freely operable without material friction on the movableparts, and formed with a plurality of ports, and means for controllingthe action thereof which are adapted to cause a minimum amount offriction when put into operation so that the life of the valve islengthened.

WVith these and other objects in view the invention comprises certainnovel constructions, combinations and arrangement of parts as will behereinafter more fully described and claimed.

In the accompanying drawings: Figure 1 is a side elevation of anembodiment of the invention. Fig. 2 is a longitudinal vertical sectionthrough Fig. 1. Fig. 3 is a section through Fig. 2 on line Fig. 4 is adetail fragmentary perspective view of a controlling stem. Fig. 5 is anend view of one of the reciprocating members. Fig. 6 is a sectionthrough Fig. 3, approximately on line 66.

Referring to the drawing by numerals, 1 indicates the body portion of avalve embodying the invention which is preferably constructed of castmaterial. The body portion 1 is cast hollow and is formed with aplurality of ports as hereinafter fully described. Body portion 1 isalso formed with an extension 2 and a ground joint or surface Secured tothe housing or body portion 1 is a top, piece 4: which has formedthereon an annular lug 5 that has the lower surface ground for meetingthe ground surface 3 of body portion 1, whereby an airtight joint isformed. The top or cover 4L has preferably formed therewith a neck 6 forcarrying an operating pin or shaft 7. The upper end 8 of neck 6 isenlarged for accommodating a handle which is fitted over the uppersquared portion 9 for turning the shaft or stem 7. The neck 6 may bemade of any desired length and also stem 7 made of corresponding length.The lower end of stem 7 has formed integral therewith or has rigidlysecured thereto a circular member or stop 10 which is adapted to engagethe washer 11 preferably of leather which also engages the lower surfaceof cover 4 in order to prevent any leakage of air between stem 7 andneck 6. The stem 7 projects below the circular member 10 and is formedinto a bar having a bifurcated portion 12 and a solid projection 13.Also a reduced stem 14: is provided for accommodating the spring 15which normally supports stem 7 and prevents the same from dropping downto an undesirable degree. The projection 1 1 is made cylindrical andengages the inner walls of a hollow projection 16 and is guided thereby.

The bifurcated projection 12 is designed to be positioned astride stem17 of a reciprocating valve member 18 arranged to close port 19. Port 19is designed to be connected with the open air at any desired point forexhausting air from port 20 which is connected with the air brakesystem. The ends of the bifurcated member 12 are designed to engage thelug 21 which is preferably square and when stem 7 is turned in onedirection stem 17 of valve member 18 will be moved against the action ofspring 22 and valve member 18 will be removed from its seat and port 19opened. When the valve has thus been operated air from the brake systemwill pass from port 20 through body portion 1 and exhaust port 19.

The solid end 13 of the lower part of stem 7 is arranged to engage astem of a sliding valve member 2% which is norn'ially held to its seatby a spring 25. Valve member is designed to control the passage of airthrough port 26, which leads toward the pump or compressed air chamber.Stem supports or holds in position spring and is adapted to reciprocatein a bored portion 27 in plug 28 which is threaded into a passage way29. Also plug 30 is formed with a bored out portion 31 for carrying theend of stem 17 of valve member 18. Plug 30 is threaded into a bored outportion 32 and acts as a plug therefor as well as a guide for stem 17.

In forming the valve the body portion 1 is preferably formed of castmaterial of some cheap quality and has cast therewith a central opening33 into which projects stems 17 and 23 and also stem 7. The body portion1 is then formed with bored out open- 'ings and 29 which are threadedfor receiving plugs 28 and 30. Before the plugs are placed in positionthe seat for valve member 153 is formed and also the seat for valvemember 2-1- is formed. The valve members 18 and 24- are then placed inposition, together with stem 7 and plugs 28 and 3t) screwed down untiltheir respective plungers 34 and 35 engage the side of body portion 1.In order to clamp or hold body portion 1 to cover 1 a plurality of bolts36 are provided that pass through the body portion 1 and cover 41- andare provided with suitable nuts for tightening the same. The bolts aredrawn sufficiently tight to cause the joint between ground surfaces 3and 5 to be air-tight and as there is no friction therebetween duringthe operation of the valve no wearing will occur at this point. The onlyfriction of any consequence is at the point where washer 11 is located,which washer may be renewed as occasion may require without any greatexpense. This washer is preferably made from some good quality ofleather, as for instance, leather belting, though other material may beused if desired. In forming the valve stems 17 and 23 kerfs or slots 37and 38 are provided by which the respective valves 18 and 24: may beground against their seats for removing any unevenness thereof or anything deposited at that point. In applying the valve bolts 39 and 10passing through suitable apertures in body 1 are used, though otherclamping means may be provided if desired.

hat I claim is: v

1. In an engineers valve, a body portion, a cover secured thereon andprovided with a neck portion, a joint seat formed on the cover portion,a stem positioned in the neck portion and provided with a stop member, awasher interposed between thestop member and the seat and adapted toprovide an air tight joint, a lug projecting from the stop member, aresilient member carried by the body portion and engaging the projectinglug to hold the stop member in engagement with the washer member, arelease port formed upon one side of the lug, a service port formedwithin the body portion on the opposite side of the lug, valves normallyclosing each of the ports, the lug being adapted to operate the valves,and means connected with the lug to open and close the 'alves.

2. In an engineers valve, a body portion, a neck portion mounted on thebody portion, a stem projecting into the neck portion, a stop memberconnected with the stem and arranged to engage the lower extremity ofthe neck portion, a lug projecting from the stop member and providedwith a bifurcated end, a release valve positioned upon one side of thelug, a service valve positioned on the opposite side of the lug, a stemcarried by each of the valves, the bifurcated end of the lug being inellgagement with the stem of the release valve and the other end of thelug being in engagement with the stem of the service valve, and meansfor operating the stem to open and close the release valve and theservice valve.

In an engineers valve, a body portion, a neck portion mounted upon thebodv portion, a stem projecting into the neck portion, a lug carried bythe stem and formed at one end with a bifurcation, a release valvecarried by the body portion upon one side of the lug, a service mlvecarried by the body portion on the other side of the lug, a stem carriedby each of the valves, a stem connected with the release valve havingformed thereon a lug, the bifurcated end of the lug engaging the stem ofthe release valve and the end of the lug being carried thereby inengagement with the stem carried by the service valve, resilient meansconnected with each of the stems for holding the service valves inclosed position and means for operating the stem to operate the lug toopen and close each of the valves separately.

In testimony whereof I atiiX my signature in presence of two witnesses.

CHARLES H. SMITH. IV itnesses O. E. BELL, G. J. Soor'r.

